Omron CJ1W-EIP21 - 10-2010 Operation Manual page 310

Adjusting the Communications Load
282
In the Edit Connection Dialog Box, input 1.0 ms as the new RPI value, and
click the OK Button. The tag data link bandwidth being used by device
192.168.250.1 (Usage of Capacity) increases to 54.67%, which indicates that
a RPI is set to a higher speed for this device.
In this case, the tag data link bandwidth being used by device 192.168.250.20
(Usage of Capacity) also increases (from 39.67% to 56.33%).
Section 10-2